Encrypt and protect your PDF files. Add passwords to your document to keep it safe. Learn how this system works and how it came about in this presentation. Tool link: https://deftpdf.com/encrypt-pdf

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Encryption, protection,
passwords – these all help us in
keeping data safe whether
we’re making an online
transaction or sending a file.

4. If you would like to know where it all
began, encryption can be found as early
as the ancient Greek times where the
term “encryption” was known as
“kryptos” which literally means hidden
secret. Back then, computers we’re non-
existent so securing information required
skills and techniques that need to be
studied.
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6. As time went by of course, cryptography also
grew, developed and changed which in the
20th century began growing with the
introduction of electronics.
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7. By now, we know this process as encryption and
can publicly be added in any data file using
two inventions in 1970’s – Public-key
cryptography and Data Encryption Standard.
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8. Here’s a detailed history in bullet form
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10. 1467: The Alberti Cipher was invented
by Leon Battista Alberti. It was known
as the first polyalphabetic cipher,
made out of two circular metals that
have mixed alphabets and attached
to one pin. The two wheels has an
uppercase letter on the outer and a
lowercase letter on the inner, rotates
in order to follow the formula and uses
“k” as its pointer. Now both the
receiver and the sender should have
the same kind of wheels and should
follow the formula. The formula starts
by the first uppercase letter written,
which indicates that it will be pointed
on the “k” and aligning them. The
encrypted message uses the small
letters and decrypting it would entail
following the big letters it is parallel to.
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12. 1940’s: Electronics were
introduced and the Enigma
Machine was invented. It was
made up of keyboard,
plugboard, lamp board, and
rotors. Each machine had rotors
with letters which they could
scramble to make it harder to
break the code. When a letter is
pressed, another letter lights up
as it corresponds to the setting
made. This was used by the Nazi
military back in World War 2.
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13. 1961: The first user
password was created
by MIT with Compatible
Time-Sharing System,
which confirms user
authentication.
1979: Data Encryption
Standard was finally
made! It was invented
by the National Bureau
of Standards using 56-
bit encryption. This
system was used for
over 20 years.
1997: Encryption was
developed into AES or also
known as Advanced
Encryption Standard. It
used 128-bit encryption
and is still used up to
present. This was also the
year that CAPTCHA was
born. Captcha was made
to avoid spams and
hackers.
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14. “
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1 2 3
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16. Of course, it is! Our number one priority is to keep
your documents secure, which is why we keep our
servers encrypted and we automatically delete
your file after you process and save! So don’t worry
about having your documents exposed after
adding a passwords because we keep all
documents confidential.
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17. Adding a password with our tools is completely free.
Yep, you heard it right! All of our tools are actually
free to use so if you need to edit, translate, convert
from PDF to word, merge multiple files, separate by
splitting pages, or perhaps make it into a ePUB, then
your tools are just right here at the HOMEPAGE.
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18. Have other needs?
Look through our free
tools in our homepage
or look into our blog
for more details!

19. You can always stay updated with us, just
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21. ✋👆👉👍👤👦👧👨👩👪💃🏃
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